Submarines
Meet our submarines: proof that we are not just masters on the waves, but under them.
Last updated 22 July 2025
Invincible-class Submarine
Staying invisible to be Invincible, a lethal addition to the arsenal
See far, act fast
Longer endurance underwater with better sensors, this is a submarine that is a lethal force to be reckoned with!
Specifications of Invincible-class Submarine
Size and Capacity
Operating in these custom-built submarines is made easier with smarter and more advanced combat systems. The location of each system is also designed around the operator.
Length: 70 metres
Displacement: 2,000 tonnes (surfaced), 2,200 tonnes (submerged)
Crew: 28
Manoeuvrability
Fast when surfaced, even faster underwater. These stealthier vessels can stay submerged 50% longer and navigate through Singapore's shallow and busy waters better.
Speed: Over 10 knots (surfaced), over 15 knots (submerged)
Weapons and Capabilities
Never get into the cross-hair of these submarines, their heavy arsenal is all ready to take out the enemy.
Heavy Weight Torpedoes
Invincible-class Submarines
Submarine Name |
|---|
INVINCIBLE |
IMPECCABLE |
ILLUSTRIOUS |
INIMITABLE |
Archer-class Submarine
Strong but stealthy, the Archer-class can strike when opponents least expect it
Sharp eyes, stealthy movements
You will rarely see or hear the Archer-class submarine. Acquired from Sweden and modified for tropical waters, this craft is a masterpiece of silence.
Specifications of Archer-class Submarine
Size and Capacity
Submariners conduct blackout training where they learn to move around the submarine in complete darkness to operate essential equipment. As masters of the "blind man's walk", we can be sure that they know the vessel like the back of their hand - literally.
Length: 60.5 metres
Beam: 6.1 metres
Displacement: 1,400 tonnes (surfaced), 1,500 tonnes (submerged)
Crew: 28
Manoeuvrability
Even as it powers its way under the waves, the Archer-class does so quietly, as its body was designed to reduce noise and magnetic signature. Meanwhile their Air Independent Propulsion system makes them quieter still.
Speed: 8 knots (surfaced), over 15 knots (submerged)
Weapons and Capabilities
Its high-tech sonar allows this submarine to track targets at a tremendous distance. Then the submarine’s torpedoes step in, using their advanced acquisition capability.
Heavy Weight Torpedoes
Archer-class Submarines
Submarine Name |
|---|
RSS ARCHER |
RSS SWORDSMAN |
Challenger-class Submarine
Small and fast, this submarine is the backbone of our underwater assets
Shaped like a shadow
Its unique teardrop shape isn't just for show: the outline of the Challenger-class submarine makes it more hydrodynamic, so that it can cut through water like the predator it is.
Specifications of Challenger-class Submarine
Size and Capacity
Submariners conduct blackout training where they learn to move around the submarine in complete darkness to operate essential equipment. As masters of the "blind man's walk", we can be sure that they know the vessel like the back of their hand - literally.
Length: 51 metres
Beam: 6.1 metres
Displacement: 1,130 tonnes (surfaced), 1,200 tonnes (submerged)
Crew: 28
Manoeuvrability
Thanks to its small and nimble size, this submarine is also speedy.
Speed: 10 knots (surfaced), 16 knots (submerged)
Weapons and Capabilities
The Challenger-class is rarely heard or seen by its foes — until its torpedoes have locked on, and it is already too late.
Heavy Weight Torpedoes
Challenger-class Submarines
Submarine Name |
|---|
RSS CONQUEROR |
RSS CHIEFTAIN |